Advanced Pricing - Provide 5% discount if total order qty of specific items on Sales order line is g

Hi,

We are on 12.1.3 and have the following requirement:

This requirement is specific to Customer XYZ and 4 specific items A, B, C & D. Let's say customer XYZ places an order that has item A,B,C,D and other few items. If the sum of any of these 4 items is 50 or more, then a discount of 5% should be auto-applied on each order line that has the item A, B, C, D on it. There could be other items on the order as well. No discount will be applied on those items and the volume of those other items will not be considered for the discount calculation.